Combination oil and/or gaseous fuel burner



March 23, 1965 R. D. REED ETAL COMBINATION OIL AND/OR GASEOUS FUEL.BURNER` Filed June 13, 1962 2 Sheets-Sheet 1 @my e A As 44' T N ,l, fm

FIG. I

INVENToRs: ROBERT D. REED JOHN sM|TH zlNK BY t ATTORNEYS March 23, 1965R, D, REED ETAL 3,174,527

COMBINATION OIL. AND/OR GASEOUS FUEL BURNER Filed June 13, 1962 2Sheets-Sheet 2 FIC-3.3

INVENTORSZ ROBERT D. REED JOHN SMITH ZlNK ATTORNEYS Unted States PatentO 3,174,527 COMBINATION OIL AND/ R GASEOUS FUEL BURNER Robert D. Reedand .lohn Smith Zink, Tulsa, Okla.,

assignors to John Zink Company, Tulsa, Okla., a corporation of DelawareFiled June 13, 1962, Ser. No. 202,254 4 Claims. (Cl. 158-11) Thisinvention relates to a burner construction and more particularly to acombination liquid and/or gas fuel burner for use in producing hightemperatures.

A primary object of this invention is to provide a burner constructioncapable of burning either gaseous and/ or liquid fuels to produce arelatively thin, at, substantially triangular flame shape. Such a llameoccurs from the burning of either fuel or with Iboth fuels tiredsimultaneously.

Another object of this invention is to provide a burner constructioncapable of creating a relatively flat, thin and substantially triangularllame which can be readily manufactured and is economical to constructand operate.

These and other objects of this invention will become more apparent uponfurther reading of the specification and claims when taken inconjunction with the following illustrations, of which:

FIGURE 1 is a side elevation View partly in crosssection depicting theburner construction of this invention and the result-ant flametherefrom.

FIGURE 2 is a top elevational view view, partly in cross-sectiondepicting the burner construction of this invention and the resultantflame.

FIGURE 3 is a frontal View taken along the line 3-3 of FIGURE 2.

FIGURE 4 is a sectional view taken along the line 4-4 of FIGURE 2.

FIGURE 5 is a sectional view taken along the line 5-5 of FIGURE 2.

FIGURE 6 is a sectional view taken along the line 6 6 of FIGURE 2.

Briefly, this invention is directed to a burner block constructionhaving an opening or port which is defined herein as being substantiallyfrusto-conical-pyramid in its peripheral shape. That is, a substantiallyrectangular base with rounded corners defines the -frontal opening whichconverges rearwardly to a substantially circular opening. A typicalliquid fuel injection system is axially located adjacent the circularopening and directed toward the frontal opening. The injection systemincludes means to mix the liquid fuel with combustion supporting gassuch as air.

A gaseous fuel-air mixture is separately injected and ignited and forcedto flow through upper and lower channels. Each of the upper and lowerchannels specifically include a horizontal portion and an angularportion, the latter of which terminates at junction with the openingdelined by the frusto-conical-pyramid walls. An input gas-air mixture isadmitted into each channel and flows along the horizontal portion untildiverted by the angular portion, which is, typically, a refractorysurface. The issuing gases substantially intersect with the liquidyfuelair mixture, above and below, in the burner opening to form aresultant flame of relatively flat, thin and of substantially triangularshape extending substantially forward of the opening. At best, the flamewill form a shape substantially identical to the burner opening, i.e.,frustoconical-pyramidic.

Description Referring now to the drawings in detail. The numerals 1liand 12 represent a furnace wall and floor con- 3,174,527 Patented Mar.23, 1965 ice struction within which the burner block 14 of thisinvention is typically installed. It is to be understood that this isgiven by way of example only as the burner block 14 is adaptable toother types of construction where high temperature is required. VTheburner block 14 is molded or constructed of a suitable refractorymaterial. A refractory material which is capable of becomingincandescent to assist the combustion of the gaseous and/ or liquidfuel-air mixtures is preferred.

The frusto-conical-pyramid opening in the burner block 14 tapers inwardfrom forward face 16 rearwardly to opening 18 to form burner cham-ber19. As shown in the drawing, the forward opening 16 is relativelyrectangular in shape with rounded ends while the rear opening 18 iscircular. The maximum vertical width of the opening is substantiallyepual to the diameter of rear opening 18.

Suitably attached to the rear face of the burner block 14 and/ orfurnace wall 10 or floor 12 is support mounting plate 20 to which thestator portion 22 of a liquid fuel or oil register is axially locatedwith respect to the burner chamber. Rotor 24 is suitably attached to thestator and rotatable therewith to control the primary air supply to theoil register. A concentric hub 26 is adapted to receive the liquid fuelguide tube 28 which is axially movable therein. A liquid fuel manifold3l) is adapted to receive, singularly or simultaneously, oil from inlet32 and/or steam at inlet 34. Steam is used to atomize the oil and assistin the combustion process. The combined oil plus steam passes throughconduit 36 into nozzle 38 where a multiplicity of horizontal openings 39are adapted to fan vaporized liquid fuel, such as oil, into the openingwithin the burner block. The combined configuration of the burner blockopening and the horizontally aligned ports 39 at the tip of the oilatomizing gun initially assists to form the desired llame shape, i.e.,fiat, thin, substantially triangular or fan shape.

Adjustably attached to the support mounting plate 20 are upper and lowerair control doors 40 and 40' suitably arranged with respect to upper andlower gaseous fuel inlet heads 42 and 42 which are rearwardly attachedto gaseous fuel supply conduits 44. The gaseous fuel, such as methane,or liquified petroleum gas (LRG.) such as butane or propane, passesthrough a multiplicity of horizontal ports 43 and 43 into mixing andcombustion channels 48 and 48. The gaseous fuel passing through ports 43and 43 mixes with controlled amounts of air entering through doors 4t]and 40. The upper and lower channels 48 and 48' are of substantiallyconstant rectangular crosssection and extend horizontally a shortdistance and thence angularly until junction 52 with the opening 19,slightly rearwardly of but substantially adjacent the forward opening16. Channels 48 and 48 intersect with the chamber at an angle more thanwith respect to forward open ing 16. Upper and lower surfaces 50 and 50'respectively serve to deflect and direct the expanding and burninggasair mixture into the burner opening. The upper and lower combustionstreams passing through channels 48 and 48 intersect in the burnerchamber, the resultant force of which produces forward ow and a flat,thin flame 60 (FIGURE 1), substantially triangular or trapezoidal inshape (FIGURE 2).

Surfaces S0 and 50 being of a refractory material, become heated by theburning gas-air mixture within channels 48 and 48. The heated surface ofthe refractory becomes incandescent or a heat source to accelerate theburning of the combustible gaseous fuel-air mixture.

A tertiary air Ysupply is admitted through opening 54 which extends fromthe forward burner block face to the rearward face on support plate 20where the air supply is controlled by a draft or shutter apparatus 56.The tertiary air supply provides not only a cooling medium for the re- 3fractory surface, but also an aid to complete combustion of the fuel.The air passing outward from opening 54 into the forward flame area isdrawn into the ame because of its relatively high velocity.

The burner chamber 19 is designed such that when liquid fuel-airmixtures are red and burned, there is little or no contact of partiallyburned oilwith the peripheral surface, hence coking and carbonizing ofthe surface is eliminated.

The preceding description makes it apparent that the construction issusceptible to some modification. For example, although the constructionhas been shown for a typical horizontal installation, ie., the flat,thin, trapezoidal shaped flame is horizontal, it is to be understoodthat the burner block may-be so rotated as to form a substantiallyvertical flame. Accordingly, these changes and others can be madewithout departing from the spirit and scope of this invention as setforth in the appended claims.

What is claimed:

1. A combination burner for combustible mixtures of gaseous and/ orliquid hydrocarbon fuels comprising the combination of:

a support block having substantially parallel forward and rear faces,

a burner chamber in said block peripherally transitioned from asubstantially circular opening at said rear face to an opening at lsaidforward face of vertical width substantially equal to the diameter ofsaid circular opening and a horizontal length greater than saiddiameter,

said block being formed with upper and lower channels extending fromsaid rear face and angularly terminating into said chamber toward saidopening at said forward face,

4;- means to inject a combustible fuel mixture axially of said chambertoward said opening at said forward face, and means to inject acombustible fuel mixture into each of said upper and lower channels tocause a resultant ame of a relatively at, thin and substantiallytriangular shape.

2. A combination burner as dened in claim l wherein said upper and lowerchannels extend substantially across the horizontal length of saidchamber walls where said channels terminate into said chamber.

3. A combination burner as defined in claim 1 wherein said upper andlower channels angularly intersect said chamber at an obtuse angletoward said forward face.

4. A combination burner as defined in claim 1 wherein an auxiliary airsupply conduit extends from said rear face to said forward face-parallelto the horizontal axis of said chamber.

References Cited by the Examiner UNITED STATES PATENTS 1,693,053 11/28Rodler 158-11 X 1,788,716 1/31 Hepburn 158-7 X 1,801,431 4/31 Irish158-11 X 1,921,152 8/33 Caldwell 158-7 2,260,166 10/41 Cope 158-72,333,531 11/43 Ferguson 158-11 2,847,063 4/58 Reed et al. 158-112,941,585 6/60 Loebel et al. 158-11 FOREIGN PATENTS 185,223 9/22 GreatBritain.

JAMES W. WESTHAVER, Primary Examiner.

PERCY L. PATRICK, Examiner.

1. A COMBINATION BURNER FOR COMBUSTIBLE MIXTURES OF GASEOUS AND/OR LIQUID HYDROCARBON FUELS COMPRISING THE COMBINATION OF: A SUPPORT BLOCK HAVING SUBSTANTIALLY PARALLEL FORWARD AND REAR FACES, A BURNER CHAMBER IN SAID BLOCK PERIPHERALLY TRANSITIONED FROM A SUBSTANTIALLY CIRCULAR OPENING AT SAID REAR FACES TO AN OPENING AT SAID FORWARD FACE OF VERTICAL WIDTH SUBSTANTIALLY EQUAL TO THE DIAMETER OF SAID CIRCULAR OPENING AND A HORIZONTAL LENGTH GREATER THAN SAID DIAMETER, SAID BLOCK BEING FORMED WITH UPPER AND LOWER CHANNELS EXTENDING FROM SAID REAR FACE AND ANGULARLY TERMINATING INTO SAID CHAMBER TOWARD SAID OPENING AT SAID FORWARD FACE, MEANS TO INJECT A COMBUSTIBLE FUEL MIXTURE AXIALLY OF SAID CHAMBER TOWARD SAID OPENING AT SAID FORWARD FACE, AND MEANS TO INJECT A COMBUSTIBLE FUEL MIXTURE INTO EACH OF SAID UPPER AND LOWER CHAMBER TO CAUSE A RESULTANT FLAME OF A RELATIVELY FLAT, THIN AND SUBSTANTIALLY TRIANGULAR SHAPE. 